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Some Global Properties of the Attractive Hubbard Model in the Superconducting Phase: T-Matrix Approximation in 2D | | S. Schafroth
; J.J. Rodriguez
; H. Beck
; | | Date: |
30 Dec 1996 | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | Affiliation: | Uni-Zurich), J.J. Rodriguez (UFF), H. Beck (Neuchatel | | Abstract: | We have applied the Fast Fourier transform (FFT), which allows to compute efficiently convolution sums, to solve the set of self-consistent T-matrix equations to get the Green function of the two dimensional attractive-U Hubbard modelbelow $T_c$, extending previous calculations of the same authors. Using a constant order parameter $Delta(T)$, we calculated $T_c$ as a function of electron density and interaction strength $U$. These global results deviate from the BCS behavior remarkably. | | Source: | arXiv, cond-mat/9612246 | | Services: | Forum | Review | PDF | Favorites | |
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